Confessions of an imaginary friend : a memoir by Jacques Papier

Jacques Papier has the sneaking suspicion that everyone except his sister Fleur hates him. Teachers ignore him when his hand is raised in class, he is never chosen for sports teams, and his parents often need to be reminded to set a place for him at the dinner table. But he is shocked when he finally learns the truth: He is Fleur's imaginary friend! When he convinces Fleur to set him free, he begins a surprising, touching, and always funny quest...